int contar=0; 
void setup() {
 pinMode(18, OUTPUT);
 pinMode(16, OUTPUT);
 pinMode(27, INPUT);
 Serial.begin(115200);
}

void loop() {
  Serial.println(contar);
      if(digitalRead(27)==1)
    {
    contar=contar+1;
    delay(300);
    }
    if (contar==1)
    {
    digitalWrite(18, HIGH);
    digitalWrite(16, HIGH);
   
   
    }

      if(contar==2)
      {
        digitalWrite(18, LOW);
         digitalWrite(16, LOW);
       
      contar=0;
      }
 
}